Motor.



L. H. NIELSEN.

MOTOR.

APPLICATION FILED MAR.1.1911.

1,007,37?.. Patented Oct. 31, 19111 2 SKEETS-SHEET 1.

L. H. NIELSEN.

MOTOR. APPLICATION FILED MAR.1,191 .1.

Pgtentedflct. 31 1911 Q2 SHEETSSHEET 2.

- a citizen of the United States,

the application controlled that the element The invention is UNITED STATES PATENT 'OFFICE.J

LUZDVIG n. Nmtsnm To alt whom it may concern:

Be it known that I,- LUnvIo H. NIELSEN, residing at Pittsburgh; in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements inMotors, of which the following is a specification.

y invention refers to means for controlling the operation of any movable element to which travel is impartedby an actuating motor, in conformity the motor itself.

1le the invention is applicable to a great variety of uses, I have shown 'herein to the doors of elevato shafts as one-of the instances of its use.

he invention consists of the combination with an actuating motor cylinder for the door, or elevator to be panion cylinder'coupled therewith in para]- lelism for cushioning the stroke of the piston of the motor cylinder.

Ordinarily, of elevator or other passenger vehicle doors,

the stroke of the motor is unrestrained so" that at the end of the stroke either in openmg or closing, there is a considerable jar due to the stoppage of the undiminished speed of movement. Iy invention has in view toprovide means whereby, without appreciably reducing the time of operation, the motor is so to be actuated will slow up at the end of the stroke in eitherdirection, resulting in movement without jar or noise.

The invention comprises a motor cylinder, a plunger cylinder in parallelism therewith, either alongside or in tandem relationship with the motor cylinder and through which circulates in either direction a body of any suitablefluid, as oil, alcohol, water,'air, etc., and valve mechanism operatively controlled by the motor cylinder plunger, f orontirely throttling the circulating fluid at or near the end of the stroke, as --herei nafter more fully set forth.

applicable to either a moving vehicle, as an elevator, for actuation of the several doors of an elevator shaft, in

which case it ismounted upon and travels with the operation of actuated, of ac m?" in the mechanical operation" quiet easy. hung in any doors of the shaft, in

or 'rirrssonen, PENNSYLVANIA.

Moron. 1,007,377. l pam...Manama Patented0ct.31,1l91l1. Application filed March 1. 1911. Serial No. mm.

which case each door is provided with separate actuating motor ion cushioning a paratus, apparatus re uirmg the movement of an element or body ata variable speed of travel. In the drawings, illustrating the application .of the invention to both arrangements, of an elevator door, which application is to be understood as illustrative of the invention only, without an restriction, 1' shows one form-6f t the actuating motor cylinder-andthe throt-" tlingcylinder are mounted side by side .upon an elevator car, the dpor or to any other Fi application of the side-by-siti arrangement of the c linders to one of the doors of an elevator shaft. larged Ion itudinalvertical sectional view, partly bro en away, throughthe throttling cylinder, Fig. 5'is a plan viewof Fig. 4, illustrating the circulating. ports. is a cross ,sectional view on the line of Fig. 5. Fig. 7 is a view similar to Fi 1 showing the cylinders in tandem'relatlon. Fig. Sis a plan view of Fig. 7.} ,ig. 9 is a similziiview showing amodification. I

In the application of the invention to a movable elevator car as shown in Fig. l of the drawings, '2 represents the wall of the elevator shaft or well provided at each floor with the opening 3 closed by thedoor 4 known manner,

VI. VI.

suitable well 7 as by carrying rollers on a supporting track. each floor-of the building,is provi with i a projection or big 5 which inthe closed position of the door is located in alinement with the vertical groove shifting shoe 7 mounted elevator car A. Any other suitable interengaging devices may be 'empl yed whereby when the caris at any articularfloorthe shoe 7 or its equivalent will be located in o'p- 10 0 erative engagement with the d shifting it toopen position. The pushioningc Under 8 and the o' erating or motor cylinder 9 are mounted side by V or etfor side or one above; the other at any suitable "10:3

the elevator car,' with proper location on and its com'pane invention'in which. 6

Fig. 4 is an en Fig.' 6 i Each door 4, provided for theopenlieng 3 .at

6 of an elongated is upon and forming a portion of the actuatmg mechanism of the" v 18 provided with a similar plunger 12 and. plunger rod 13, both plungers being con-' nected at their outer ends in any suitable way, as by a bracket 14 with the shoe 7 any convenient sliding or rolling bearing mechanism also being provided, if desired. Movement is imparted to plunger 12 of motor cylinder 9 byfluid pressure through connections l 5, 16, leading to each end of the cylinder from a controllin four-way valve 17 located in the interior 0 the can within easy reach of the operator and having an operating handle 18. Fluidpressure may be maintained with the valve through connection 19' and a flexible h'ose from-a stationary source of pressure,'or from a tank mounted on and movable'with the car, as preferred. For the purpose of controlling the flow of a cushioning fluid from one endof cushioning cylinder 8 to the other, said cylinder is provided with ports 20, 21, respectively, leadmg'from each end to valve ports 20. and 21' respectively,

extending through the base of a valve casing 22and containing a controlling val've 23. Said valve is adapted to be shifted 'by its stem 24 to establish free circulation during the commencement and major portion of the stroke and to partly or entirely throttle the circulation at the endpf the stroke. This is accomplished by means of any suitable mechanism operating in conformity with the stroke of the motor cylinder plunger," as a cam 25. Said cam is rigidly secured with plunger rods 11 and 13;.byattachment to bracket 14, and by its groove 26, as shown in Fig. 2, engages the terminal of valve rod 24. When the plunger 12 of the actuating cylinder 9 is at the extremity of its stroke in either direction, the "valve will be thrown to the limit'of its movement as indicated in v Fig. 6 entirely or almost entirely closing one of the circulating ports. \Vhen moyement is imparted to the bracket 14: and shoe 7 the freedom'of 'the' flow of the cushioning fluid isQestablished, due to the straight iacesfof the cam groove, the full open position of the circulating valve ports: being maintained.

Near the end of the stroke, the circulation is'gradually throttled by the inclined terinina'l of the cam and the speed is correspondingly reduced, due tothe resistance of the circulating fluid, whereby to accomplish the ends in view. In the'co'nstruction shown in Fig; 3, the invention in the.samearrangement of cylinders'ls shown as applied to the operation of shifting one of-the doors of the elevator shaft, in which case' the bracket 14' is secured to the door 4/ by its extens1on 7 ivill be readily understood, the throttling aiid-motor g zylindcrs 83!), together with the several co-a'ctin'g and inia'irporated parts as above described being mounted in any con merit to the element to be moved.

venient stationary position with relation to the door and operated by controlling connec-.

tions and a valve at any desired position. The construction and operation is the same as has been described with regard tothe mounting of the apparatus movably on the car.

In the arrangement .shownin Sheet. 2 of the drawings, the throttling cylinder 8 and the motor cylinder '9 are mounted in tandem arrangement on either a stationary or movable support as desired, and'provided with the corresponding parts and co n'nections indicated by the corresponding numerals with the exponent a and operable in the same manner generally as has been-above described. The only diii'erence in this ar' rangement is that, instead of mounting the cylinders side by side, their parallelism is provided for by arranging'the cylinders on the same center and in ali'nement with each other. In such case, each plunger may be provided with its separate rod if desired, having a separate attachment 'or connection with the shoe 7, or if preferred, a single continuous rod may be used with the same results. In either case, the simultaneous movement of the pluii'gers of'each'cylindor is providedfor and controlled, due'to their connection with the shifting shoe and the operation of the cam connected and'travel- 'ing with the shoe and its'connected parts.

It will be understood that any other suitable arrangement of the two' cylinders may be adapted, as bylocating them closely together endwise in alinement'and extendinga common plunger rod outwardlyfthrough one end of one of'the cylinders for attachment with the shoe, as illustrated in Fig'. 9. In such case, the motor cylinder 9 and con trolling cylinder 8? are located in tandem parallelism relation, close together as shown,

, employing. a single continuous rod 13 connected at one end with the yoke 14F, shoe 7 and cam 25". With either arrangement, the shoe or any equivalent'coupler device, is shifted to the desired-extent in eitheridireetiou transmitting 'corresponding move- In Figs. 7 and 8 the application of'the mechanism to the moving ofany weight or element IV through the connected terminal,

5 adapted to be engaged by the shoe 7,"is illustrated. v

other modifications'or applications of itare withintlie province of the skilledmechanic.

The novel feature common to all otthe constructions isjthe combin ati'oiii with the motor "cylinder of the cmitrolling cylinder and its circulation valye ui'rhichinturn chnirolled by'the m'hvement of the motor cylinder, the cylindersbeing ii -parallelism,

and the plunger of each traveling through the same range of movement.

Having described my invention, what I claim is 1. Operating mechanism consisting of a motor cylinder and a fluid-containing cushioning cylinder in parallelism therewith,

and means subject to the operation of the motor cylinder for controlling the flow of the fluid of the cushioning cylinder, substantially as setforth.

2. The combination wlth a movable eleplunger, and throttling m echanism -con-" trolled by the motor plunger.

3. The combination with a movable element, of a motor plunger for actuating the element, a cylinder containing a cushioning fluid and in parallelism with the motor plunger, and a throttling valye and controlling cam-therefor actuated by the motor plunger. i In testimony whereof I hereunto afiix my signature in the presence of two witnesses. LUDVIG H. NIELSEN. Witnesses:

o. M. omim, firms. S. LErmY, 

